Professor Jasper Halekas Van Allen 70 [Clicker Channel #18] MWF 11:30-­‐12:30 Lecture, Th 12:30-­‐1:30 Discussion

¡  Objects have mass (inertia)

¡  Applying an unbalanced force to a mass causes it to accelerate

¡  Objects can have not only mass, but charge

Buoyant Force

Gas Pressure Force

¡  Gravitational forces act on mass, and are themselves caused by concentrations of mass

¡  The gravitational force can be thought of as caused by a field that fills all of space

¡  Electrical forces act on charged particles, and are caused by charged particles

¡ Magnetic forces act on moving charges, and are caused by moving charges

¡  Gravitational forces are associated with gravitational potential energy

Equipotentials

¡  Electrical forces are associated with electric potential energy

Equipotentials

¡ Will not be handed out

¡  Go to the class ICON page, or the main physics dept. web page, to navigate to the main class page §  Here you can find the syllabus and class schedule (and a copy of these notes)

¡  Instructor: Jasper S Halekas ¡  Office: 414 Van Allen Hall ¡  Phone: (319) 335-­‐1929 ¡  E-­‐mail: jasper-­‐halekas@uiowa.edu ¡  Office Hours:

§  2:00-­‐3:00 pm Tuesday, §  9:00-­‐10:00 am Wednesday, §  4:00-­‐5:00 pm Thursday §  Or by Appointment

¡  Lectures: MWF 11:30-­‐12:20, 70 Van Allen ¡  Discussion: Th 12:30-­‐1:20, 70 Van Allen Hall

¡  Required Text: §  Fundamentals of Physics, Halliday & Resnick, 10th Edition, Volumes 1&2, Jearl Walker, with Wiley Plus.

¡  Required Lab Text: §  Experiments in Electricity, Magnetism, & Light + Quantum Physics, John Goree and Anthony Moeller.

¡  Course Web Pages: §  http://www.physics.uiowa.edu/~jhalekas/teaching/physII_2016/index.html

§  https://icon.uiowa.edu/d2l/home/2448875 §  http://www.wileyplus.com/class/491564

¡  Notes from each class (both PPT and blackboard material) will be merged and placed online in PDF form within one day after the class

¡  Exam Schedule: Two Midterm Exams: §  Wednesday, Feb. 24 Chs. 13, 21-­‐24 §  Wednesday, April 6 Chs. 25-­‐29 §  Final Exam, TBD Date Chs. 13, 21-­‐32

¡  Grading: §  Homework 20% §  Labs 20% §  Two Midterms 15% Each §  Final Exam 30% §  Participation Extra Credit (up to 2%)

¡  Weekly homework assignments are to be completed online using WileyPLUS. All assignments must be completed online by 11:00pm on Wednesdays. §  Online assignments will have separate conceptual (one chance per problem, no hints) and mathematical sections (two chances per problem, with hints)

¡  Twice per semester (before each exam), homework solutions will be required in hard-­‐copy format with all work shown.

¡  The laboratory assignments are a key part of the course, to be held under the supervision of your teaching assistant, who will also grade the laboratory reports.

¡  Only 9 of 10 labs will be counted toward grading, however, there will be no make-­‐up labs.

¡  Midterm exams will be held during regular class hours on the dates specified above. The final exam will be two hours, scheduled during finals week at a time to be announced.

¡  Exams will be closed book, but each student may bring a single-­‐sided 8.5x11 equation sheet.

¡  Exams are long-­‐form and require work to be shown. Partial credit may be granted for correct methodology, even if the final answer is incorrect.

¡  Homework and exam questions treat same material, but are slightly different in form Typical Homework Question: Typical Exam Question:

2/4/2015 Print Assignment: Homework #2 Math ::false

http://edugen.wileyplus.com/edugen/shared/assignment/test/agprint.uni?numberQuest=true&titleType=false&printType=withAnswer&alg_version=&printmode… 3/3

(a) Number Units

(b) Number Units

*1 -­ significant digits are disabled;; the tolerance is +/-­1 in the 3rd significant digit *2 -­ significant digits are disabled;; the tolerance is +/-­1 in the 3rd significant digit

5. *Chapter 22, Problem 008

In the figure the four particles are fixed in place and have chargesq1 = q2 = 3e, q3 = 2e, and q4 = -­8e. Distance d = 2.76 μm. What is the magnitude ofthe net electric field at point P due to the particles?

Number Units

Significant digits are disabled;; the tolerance is +/-­1 in the 3rd significant digit

77.808465960590 *1 ° (degrees)

-­77.808465960590 *2 ° (degrees)

0 *1 N/C or V/m

Physics II [1702] Final Professor Jasper S. Halekas

May 13th, 2015 12:30-2:20

Instructions: This exam is closed book, and no calculators are needed or allowed. You are allowed one 8.5x11 formula sheet (single-sided). Please show all work explicitly – you will receive partial credit for correct methodology even if the final answer is incorrect. Take your time, read the questions carefully before answering, and answer every part of the question. Good luck! Question 1 (6 points): A point in empty space is near 3 charges as shown. The distances from the point to each charge are identical. A (2 points). Draw a vector showing the direction the electric field points. !!

!!

!!!!B (2 points). What is the angle between the electric field and the x-axis at the point? C (2 points). If the distance to each charge is L, what is the magnitude of the electric field at the point?

x

y

+2Q

+Q

+Q

¡  To help you to prepare for the exams, which require long-­‐form answers, I do two things:

§  Assign two long-­‐form homeworks, which I personally hand grade

§  Provide previous exam questions as a study guide

¡  Participation will be tracked by your response to clicker questions during lecture. These questions are un-­‐graded, so any response counts as participation. §  You are all expected to have clickers by Friday

work to be shown explicitly. Partial credit may be granted for correct methodology, even if the final answer is incorrect.

Participation: Participation will be tracked by student’s response to clicker questions during lectures. These questions are un-graded, so any response, correct or incorrect, counts as participation. Extra credit will be assigned based on participation on a lecture-by-lecture basis (answering a question during a lecture counts as participation for that lecture), up to a maximum of 2% of the overall points in the course. In other words, the extra credit will be worth up to 10% of the value of the homework and labs, and up to 13.33% of the value of each of the midterms. Extra credit will be awarded based on the following sliding scale:

>60% participation 0.5% of overall points >80% participation 1.0% of overall points >90% participation 2.0% of overall points Note that for the purposes of this credit, 90% participation earns you the

maximum points. This is to allow for a few unavoidable absences, lost clickers, dead batteries, incorrectly set clicker channels, etc. etc.

Absence Policy: Attendance is encouraged but not required for all regular class meetings,

but the participation-based extra credit will not be made up for any reason in the event of absence. Attendance during scheduled exams is required and make-up exams will only be given if the student comes to the instructor with appropriate justification before the exam to plan a make-up. Justification required is a completed UI Student Absence form and supporting documentation such as a doctor’s note, or other statement regarding authorized activities signed by a responsible official.

Communication: Students may communicate with the professor by phone, e-mail, or in person. E-mails and phone calls may not be answered immediately (other than in true emergencies). Students with issues or questions should if possible raise them in person, in discussion, by attending office hours, or by scheduling an appointment with the professor.

Physics Tutorials: Teaching assistants are available for free tutoring in the TILE Commons Room, 310 Van Allen Hall, during posted hours. While you are strongly encouraged to seek help from the TAs and the instructor, do not expect them to do your homework for you.

¡  To give you a chance to practice tough concepts and check your understanding in real time – physics is tricky!

¡  To give me feedback on what you get and what you don’t – I’m not perfect!

¡  Because clicker questions can (should) be fun

¡  Because peer-­‐reviewed research shows that students in the worst classes that use clickers and other interactive learning techniques learn more than those in the best classes that don’t

¡  The fact that I ask clicker questions in part to get feedback does not mean that you should not also ask other questions in class

¡  If you have a question, others may also have the same question

¡  Don’t be afraid to speak up!

¡  Discussions are a chance to get into the details of problem solving and mathematical techniques §  We will practice problem-­‐solving by going over any questions on previous homework and working through new problems together

§  We will also use this time to review and sometimes introduce mathematical techniques and concepts

§  In our first discussion (tomorrow), we’ll discuss vector math

¡  Please let me know if you have questions, comments, complaints, or are struggling with particular concepts. This class is for you, and I am here to help.

§  Students may communicate with me by phone, e-­‐mail, or in person

§  Students with issues or questions should if possible raise them in person by attending office hours or by scheduling an appointment

§  If you prefer to give me anonymous feedback there is a comments envelope on my door

Dates& Week& Reading&Due&Monday&

Lab&Monday&

Homework&Due&Wednesday&

Test&

Jan&19<22& Week&1& & No#Lab# & &Jan&25<29& Week&2& Chapter&13& No#Lab# Online& &Feb&1<5& Week&3& Chs.&21&to&22<3& E1& Online& &Feb&8<12& Week&4& Chs.&22<4&to&23& E2& Online& &Feb&15<19& Week&5& Chapter&24& E3& Hardcopy& &Feb&22<26& Week&6& No#Reading# No#Lab# No#Homework# Midterm&1&

Wed.&2/24&Chs.&13,&21<24&

Feb&29<&Mar&4&

Week&7& Chapter&25& E4& Online& &

Mar&7<11& Week&8& Chs.&26&and&27& E5& Online& &Mar&14<18&

Spring&Break&

& & & &

Mar&21<25&

Week&9& Chapter&28& E6.5& Online& &

Mar&28<Apr&1&

Week&10& Chapter&29& E9& Hardcopy& &

Apr&4<8& Week&11& No#Reading# No#Lab# No#Homework# Midterm&2&Wed.&4/6&Chapters&25<29&

Apr&11<15& Week&12& Chapter&30& E8& Online& &Apr&18<22& Week&13& Chapter&31& OS1& Online& &Apr&25<29& Week&14& Chapter&32& E11& Online& &May&2<6& Week&15& No#Reading# No#Lab# No#Homework# &May&9<13& Finals&

Week&No#Reading# No#Lab# No#Homework# Final&

Chs.&13,&21<32&&